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second orifice
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  “second orifice”译为未确定词的双语例句
     A lowest temperature of 3.0K was obtained with the double-orifice version in the present study. It appears that the second orifice enhances the phase shifting effect of the same stage orifice and improves the temperature distribution of the pulse tube.
     经反复实验 ,采用双小孔结构的二级脉管制冷机第一、二级最低制冷温度分别达到 4 6K和 3.0K。
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     Second,
     二是对于?
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     Second, the s
     第二章:追寻一个普通读者的阅读过程,寻找对诗集的戏剧性的体验。
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     Objective To map the location of the second mesiobuccal canal (MB2) orifice.
     目的 寻找上颌磨牙近中颊根第二根管 (MB2 )根管口的定位规律。
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     In the second and third parts,there were one or two cutaneous arteriole and superficial orifice from the fibular artery.
     2 / 5及 3 / 5区段均有1~ 2支皮动脉及 1~ 2个皮动脉浅出点 ,来源于腓动脉 ;
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  second orifice
In the hole type, the second orifice is seen at about midleaflet level.
      


Three types of a two stage pulse tube refrigerator named double orifice type,double inlet type and reservoirless type which were in the hot end of the second stage pulse tube were tested.The lowest temperature was 3 3K,15 5K and 14 8K,respectively.The experimental result showed that the second orifice in the double orifice type had the role of enhancing the phase shifting effect and reducing the cool down process.·

在二级脉管制冷机的第二级脉管热端分别采取了双小孔、双向进气以及无气库等三种不同的形式进行了实验比较,得到的最低制冷温度分别为33K,155K和148K。实验结果表明,第二小孔具有强化调相及加快降温速率的双重作用。

This paper introduces the results about DC flow and second orifice. In analysis, it isfound that direct current flow (DC flow) through double-inlet valve in pulse tube refrigeratoris not zero generally) and the DC flow direction may change when pressure wave changes.For one-order sinusoidal wave, the net DC direction is from hot end of pulse tube to coldend; but if second-order sinusoidal wave existing, the net DC flow direction may be changed.During experiments, through measuring the change of temperature,...

This paper introduces the results about DC flow and second orifice. In analysis, it isfound that direct current flow (DC flow) through double-inlet valve in pulse tube refrigeratoris not zero generally) and the DC flow direction may change when pressure wave changes.For one-order sinusoidal wave, the net DC direction is from hot end of pulse tube to coldend; but if second-order sinusoidal wave existing, the net DC flow direction may be changed.During experiments, through measuring the change of temperature, author found thatthe net DC flow direction in pulse tube is from pulse tube cold tip to hot end (opposite togenerally condition). Then second orifice is arranged from second-stage reservoir to highpressure pipe of compressor. Through experiments, second orifice is revealed to be effectiveto lower the temperature to a certain extent. This scheme is proposed for the first time.

1前言脉冲管制冷机已基本达到了实用化的程度。但在理论方面,仍有较多问题存在,其中双向进气型脉冲管制冷机内的环流问题成为一个讨论的热点和难点。1991年朱绍伟进行双向进气方案的实验验证时[1],已经提到了环流问题,即进出双向阀门的流量不等造成的冷端温度...

Experiments were performed on a self\|made double\|orifice two\|stage pulse tube refrigerator to study the effects of the double\|orifice on the performance of the refrigerator and to determine the minimum refrigerative temperature. The experimental results comparing the double\|orifice version with the double\|inlet version verified that the former could reach a lower temperature than the latter. A lowest temperature of 3.0 K was obtained with the double\|orifice version in the present study. It appears that...

Experiments were performed on a self\|made double\|orifice two\|stage pulse tube refrigerator to study the effects of the double\|orifice on the performance of the refrigerator and to determine the minimum refrigerative temperature. The experimental results comparing the double\|orifice version with the double\|inlet version verified that the former could reach a lower temperature than the latter. A lowest temperature of 3.0 K was obtained with the double\|orifice version in the present study. It appears that the second orifice enhances the phase shifting effect of the same stage orifice and improves the temperature distribution of the pulse tube.

介绍了自行研制的二级双小孔型脉管制冷机的基本结构,着重分析了第二小孔、结构参数对制冷机性能的影响,指出了进一步改进的方向. 实验表明,采用双小孔结构的二级脉管制冷机第一、第二级最低制冷温度分别达到46 K 和3.0 K.

 
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